EP4311945A1 - Bloc de soupapes de fonctionnement d'urgence pour une grue mobile - Google Patents

Bloc de soupapes de fonctionnement d'urgence pour une grue mobile Download PDF

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Publication number
EP4311945A1
EP4311945A1 EP22187446.4A EP22187446A EP4311945A1 EP 4311945 A1 EP4311945 A1 EP 4311945A1 EP 22187446 A EP22187446 A EP 22187446A EP 4311945 A1 EP4311945 A1 EP 4311945A1
Authority
EP
European Patent Office
Prior art keywords
valve block
check valves
connection
engine
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22187446.4A
Other languages
German (de)
English (en)
Inventor
Johannes Schürmann
Thomas Schmithüsen
Verena BOHMANN
Harald Wiesner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Manitowoc Crane Group France SAS
Original Assignee
Manitowoc Crane Group France SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Manitowoc Crane Group France SAS filed Critical Manitowoc Crane Group France SAS
Priority to EP22187446.4A priority Critical patent/EP4311945A1/fr
Priority to US18/354,416 priority patent/US12528677B2/en
Priority to CN202310890521.8A priority patent/CN117466154A/zh
Priority to JP2023118802A priority patent/JP7684351B2/ja
Publication of EP4311945A1 publication Critical patent/EP4311945A1/fr
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/88—Safety gear
    • B66C23/90—Devices for indicating or limiting lifting moment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices
    • B66C13/20—Control systems or devices for non-electric drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/88—Safety gear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08—Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803—Modular units
    • F15B13/0807—Manifolds
    • F15B13/0814—Monoblock manifolds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08—Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803—Modular units
    • F15B13/0832—Modular valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08—Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803—Modular units
    • F15B13/0878—Assembly of modular units
    • F15B13/0896—Assembly of modular units using different types or sizes of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
    • F15B20/002—Electrical failure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
    • F16K11/14—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by one actuating member, e.g. a handle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0008—Mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
    • F15B2211/3057—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve having two valves, one for each port of a double-acting output member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/31523—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source and an output member
    • F15B2211/31541—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source and an output member having a single pressure source and multiple output members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/3157—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line
    • F15B2211/31588—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line having a single pressure source and multiple output members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/321—Directional control characterised by the type of actuation mechanically
    • F15B2211/324—Directional control characterised by the type of actuation mechanically manually, e.g. by using a lever or pedal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • F15B2211/7135—Combinations of output members of different types, e.g. single-acting cylinders with rotary motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/875—Control measures for coping with failures
    • F15B2211/8757—Control measures for coping with failures using redundant components or assemblies

Definitions

  • the present invention relates to a valve block, by means of which it can be ensured in the event of a failure of the main energy supply to the engine drives that the engine engines can be supplied with hydraulic fluid via an independent emergency energy supply.
  • the present invention further relates to a mobile crane with such a valve block with which the crane drives can be supplied by means of an emergency energy supply.
  • Crane functions such as lifting or lowering a load on the hoist rope, luffing the crane boom in or out as well as rotating the crane superstructure relative to the crane undercarriage are regularly carried out in mobile cranes by hydraulic units such as hydraulic motors or cylinders. These in turn are driven by hydraulic pumps, to which they are connected via hydraulic lines in order to be supplied with a volume flow of hydraulic fluid.
  • hydraulic units such as hydraulic motors or cylinders.
  • hydraulic pumps to which they are connected via hydraulic lines in order to be supplied with a volume flow of hydraulic fluid.
  • So-called “transformers” represent an example of such an independent energy supply and essentially consist of a gear motor-pump combination that can be driven by an external hydraulic energy source and delivers drive power to a hydraulic gear pump.
  • the external hydraulic energy source can be provided, for example, by another crane or a hydraulic unit, a so-called “power pack”.
  • the gear pump can, for example, take hydraulic fluid from the superstructure tank of the receiver crane and provides the hydraulic pressure and volume flow for the delivery supplying engines ready. Since the hydraulic main drive system is not used, the engines are driven with reduced power.
  • Previous emergency drive systems have a large number of valves that have to be manually operated in a precisely specified manner in order to control a desired engine in the desired manner.
  • the individual valves are combined in a compact unit.
  • a piping or even tubing between the individual valves, as in this case corresponding devices from the prior art are the case, can therefore be omitted.
  • the hydraulic connection between the individual valves and also other hydraulic components takes place through channels formed in the valve block body, so that compared to known systems with valves that are piped or hose-connected to one another, not only the maintenance effort can be reduced to a considerable extent, but also the construction volume taken up by the valve system.
  • the valve block accommodating the individual valves does not necessarily have to be designed as a one-piece body, but rather can also have a modular structure and have several module bodies that are hydraulically connected to one another.
  • this makes it possible not only to detach individual hydraulic components from the rest of the valve block for maintenance or repair purposes, but also to replace them with new components.
  • valve block according to the invention can provide an engine connection for any engine drive in order to connect it to an emergency drive device.
  • the check valves and/or the actuation valve are designed to be actuated by means of a hand lever, with the actuation of the check valves being designed in particular in such a way that simultaneous opening of several check valves is prevented.
  • each of the valves it is therefore possible for each of the valves to have its own hand lever, which operating personnel can use to move the valve into a desired position.
  • the levers can be designed in such a way that a lever physically blocks the other levers as soon as it is brought into a position by the operating personnel in which the associated valve is opened, i.e. connects the corresponding power drive with the emergency drive device.
  • each of the check valves having a tool handle with which the hand lever can be releasably coupled.
  • the lever Before the lever is connected to a valve to be opened, it must first be removed from the previously operated valve, which creates a further indication for operating personnel to close the previously operated valve first.
  • valve block can further be simplified by the hand lever or the tool handles of the check valves being arranged and/or aligned in an identical manner on the valve block, in particular in an adjacent manner.
  • This measure means that all available valves and their operating levers are visible to operating personnel at the same time.
  • valves arranged in the same way the respective actuation position of all valves can also be seen.
  • the valves can be arranged in such a way that a certain spatial direction of the hand lever or the tool grip indicates the same actuation position for all valves, for example "open” or "closed”
  • the position of the hand lifting or the tool attacks of the check valves can be fixed mechanically, in particular in their position blocking the hydraulic connection between the drive connection and the engine connection assigned to them. This prevents uncontrolled opening of individual valves.
  • the check valves in particular their tool handles or their hand levers, can have a position indicator, in particular in the form of a recess or a projection on the tool handle or hand lever.
  • a position indicator in particular in the form of a recess or a projection on the tool handle or hand lever.
  • valves Any suitable design of the valves is conceivable for opening or blocking the hydraulic connection between the drive connection and the respective engine connections.
  • rotary slide valves represent a preferred embodiment of a check valve because of their compact design.
  • these check valves can be designed as 6/2-way valves, with which 6 hydraulic connections can be connected in 2 different valve positions.
  • the actuating valve can be designed as a 5/3-way valve, which interconnects 5 hydraulic connections in 3 different positions.
  • the check valves serve the function of releasing or blocking a hydraulic connection between the drive connection and the respective engine connection.
  • a “pre-selection” of a power plant to be driven with the emergency drive device can be carried out.
  • the actuating valve can not only have the task of defining the direction of movement or rotation of the power drive to be driven, but also an additional locking option for the hydraulic connection between the drive connection and the respective engine connections.
  • the hydraulic connection can ultimately be released by opening the actuating valve in a direction corresponding to the desired direction of movement of the crane engine in order to immediately drive the corresponding crane engine via the emergency drive device.
  • the direction of movement of the engine depends on which of the engine's hydraulic supply lines is connected to a pressure side or a return side of the drive connection via the actuating valve.
  • the actuating valve can be arranged in the hydraulic connection of the drive port with the engine ports between the drive port and the check valves.
  • a separate actuating valve can also be provided for each engine connection, which are arranged between the corresponding check valves and the drive connections assigned to them.
  • the actuation valve can be designed so that in a basic position it does not supply at least one of the check valves with a feed pressure.
  • the valve block can also have one or more lowering brake valves, which prevent a return movement of crane drives caused by gravity.
  • the valve block can have at least one lowering brake valve, which can also be used is designed to either release or block a hydraulic connection between the return sides of a corresponding engine connection and the drive connection.
  • the actuating valve can also supply the lowering brake valve(s) with working pressure.
  • one embodiment of the valve block has at least one hydraulic connection, which serves to return hydraulic fluid emerging as a leak from at least one of the check valves and / or from the actuating valve to the drive connection.
  • a further aspect of the present invention relates to a mobile crane with an emergency drive device, at least two crane drives, in particular assigned to the superstructure, and an emergency operation valve block in one of the embodiments described above.
  • the Figure 1 shows a valve block 1 according to the invention with a base body 10, on which three check valves 4A, 4B, 4C, an actuating valve 5 and a lowering brake valve 9 are mounted in such a way that their inner fluid channels are fluidly connected to those of the base body 10. Piping or tubing for the individual hydraulic components is therefore not necessary in the valve block 1 according to the invention. Rather, there is a “direct” transfer of hydraulic fluid here between the individual components, which are connected to each other via sealing contact surfaces.
  • the valve block to be seen has three identical check valves 4A, 4B, 4C, which are each assigned to a power drive, for example a slewing gear, a luffing gear and a hoist of a mobile crane and are hydraulically connected to corresponding engine connections 3A, 3B, 3C.
  • the check valves 4A, 4B, 4C are designed in an identical manner and are also arranged in an identical orientation on the base body 10, so that actuation can take place by means of a hand lever, not shown, which can be detachably coupled to the respective tool attacks 7.
  • each valve 4A, 4B, 4C is displayed via a slot 8 incorporated into the front of the tool attachment 7, for the position of which a legend attached to the base body 10 provides an aid to interpretation:
  • the hydraulic connection is to the engine connection 3A, 3B, 3C locked, which is the usual position for normal crane operation.
  • the corresponding check valve 4A, 4B, 4C is open, so that a power unit connected to the corresponding engine connection 3A, 3B, 3C can be supplied with hydraulic fluid in emergency operation.
  • the individual tool attacks 7 can be mechanically locked in a closed position of the valves 4A, 4B, 4C, for example by in the Figure 1 folding pins visible.
  • the valve block 1 also has an actuating valve 5, which is connected on the one hand to each of the check valves 4A, 4B, 4C and on the other hand to a drive connection 2.
  • actuating valve 5 which is connected on the one hand to each of the check valves 4A, 4B, 4C and on the other hand to a drive connection 2.
  • actuation valve 5 also assigning the pressure side 2A and the return side 2B of the drive connection 2 to the respective sides of the engine connections 3A, 3B, 3C takes place in order to specify the direction of movement of the engine engines.
  • valve block 1 has a lowering brake valve 9 for corresponding engine connections 3A, 3B, 3C.
  • valve block 1 not only enables a quick exchange of individual components, but also the optional installation of different components according to the respective installation situation of the valve block 1 in, for example, different types of cranes.
  • FIG. 2 shows a hydraulic circuit diagram for the in the Figure 1 Valve block 1 can be seen.
  • the function and operation of the valve block 1 will be explained below with reference to Figure 2 take place.
  • a volume flow of hydraulic fluid is provided by a transformer via the pressure side 2A of the drive connection 2.
  • the basic position of the actuating valve 5 can be seen, the hydraulic fluid circulates on the pressure side 2A.
  • the pressure relief valve DBV 2 limits the feed pressure and opens at approx. 30 bar.
  • the feed pressure is present at all check valves 4A, 4B, 4C.
  • the feed pressure is available via the check valve 4A at the (not labeled) valve for connecting the slewing gear brake BR.
  • connection H2 By opening the check valve 4B with the actuating valve 5 closed, hydraulic fluid under feed pressure reaches connection H2, so that a hoist brake connected to it opens.
  • the actuating valve 5 is moved to its lowest position so that returning hydraulic fluid from the engine is present at the lowering brake valve 9A.
  • there is working pressure on the pressure side 2A at the lowering brake valve 9A which opens due to this pressure addition.
  • the load-lifting hydraulic fluid can therefore flow towards the tank via the actuation valve 5 and the pressure relief valve DBV 2.
  • the burden is lowering.
  • the returning hydraulic fluid from the engine returns to the tank via the check valve 4B, the actuation valve 5 and the pressure relief valve DBV 2.
  • the actuating valve 5 To rock out, the actuating valve 5 is brought to its lowest position so that hydraulic fluid reaches the pressure reducing valve 9B via the orifice N2. The luffing cylinder slowly retracts and the boom lowers. The returning hydraulic fluid from the cylinder flows back into the tank via a crane control block, not shown here.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Automation & Control Theory (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control And Safety Of Cranes (AREA)
  • Jib Cranes (AREA)
EP22187446.4A 2022-07-28 2022-07-28 Bloc de soupapes de fonctionnement d'urgence pour une grue mobile Pending EP4311945A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP22187446.4A EP4311945A1 (fr) 2022-07-28 2022-07-28 Bloc de soupapes de fonctionnement d'urgence pour une grue mobile
US18/354,416 US12528677B2 (en) 2022-07-28 2023-07-18 Emergency-operation valve block for a mobile crane
CN202310890521.8A CN117466154A (zh) 2022-07-28 2023-07-19 用于移动式起重机的紧急操作阀组
JP2023118802A JP7684351B2 (ja) 2022-07-28 2023-07-21 移動式クレーンのための非常動作バルブブロック

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22187446.4A EP4311945A1 (fr) 2022-07-28 2022-07-28 Bloc de soupapes de fonctionnement d'urgence pour une grue mobile

Publications (1)

Publication Number Publication Date
EP4311945A1 true EP4311945A1 (fr) 2024-01-31

Family

ID=82781290

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22187446.4A Pending EP4311945A1 (fr) 2022-07-28 2022-07-28 Bloc de soupapes de fonctionnement d'urgence pour une grue mobile

Country Status (4)

Country Link
US (1) US12528677B2 (fr)
EP (1) EP4311945A1 (fr)
JP (1) JP7684351B2 (fr)
CN (1) CN117466154A (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2984985A (en) * 1959-02-16 1961-05-23 Macmillin Hydraulic Engineerin Hydraulic operating and control system
GB969019A (en) * 1961-03-15 1964-09-09 John Milton Anthony Blatchford Improvements in or relating to mobile cranes and similar vehicles
DE19646425A1 (de) * 1996-11-11 1998-05-14 Rexroth Mannesmann Gmbh Ventilanordnung

Family Cites Families (8)

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US12528677B2 (en) 2026-01-20

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